http://www.weidu.org/~thebigg/README-WeiDU.html#sec49LAF HANDLE_TILESETS
STR_VAR
tiz_path = ~mymod/tilesets~
ti
zunpack_path = ~mymod/bin~
END
in this exemple the strig variable tizunpack_path should be tisunpack_path (with an s)
( and if you change the default path for tisunpack.exe, tisunpack.exe shoud be in a win32 folder in mymod/bin )